Atmospheric Chemistry Laboratory building and personnel offices are hosted in the Institute for Environmental Research and Sustainable Development (IERSD), one of NOA's three institutes. Is located at P. Penteli, on Koufos hill, about 20 km north of the city of Athens.

Sampling equipment

• Semi-automated filter samplers (2 units) for the determination of PM2.5 and PM10 concentrations respectively

• Automated filter sampler (16 sampling cycles autonomy) for the determination of the fine and coarse fractions of particulate matter (PM2.5 and PM2.5-10).

• Pocket pumps with 0-200 ml/min flow for gas sampling

• Radius geometry passive samplers

Analytical equipment

• Spectroscopy techniques: atomic absorption spectrometers (flame and graphite/Zeemann correction/autosampler furnace technique) and a Dual–Beam UV-Vis spectrophotometer

• Chromatography techniques: gas chromatography system (with flame ionization/electron capture detector GC-FID/ECD), a high performance liquid chromatography (HPLC) with fluorescence and diode array detectors and a compact ion chromatograph (IC)

• Water purification system MilliQ.

• Weighting systems: analytical microbalances (5 and 6 digits) and calibration weights (class E2).

• Sample preparation systems: controlled vacuum and temperature evaporation system (with water bath), ultra sonic bath for sample processing, high temperature oven (1100 °C) and drying oven (330 °C).

• Miscellaneous equipment: pH/conductivity meter, digital thermometer with Pt100 sensor, digital flow meters (0-300ml/min and 300ml/min-30l/min), ball flow meters (5l/min, 25l/min).

Mobile Air Quality Monitoring Station

The National Observatory of Athens (N.O.A.) conducts atmospheric pollution measurements in Attica since 1970. In 1996 it acquired the first mobile station and since 2010 A.C.L./N.O.A. operates the Mobile Air Quality Monitoring Station, hosted in a VAN type vehicle, for the monitoring of air pollutants levels. The Mobile Station provides flexibility in equipment transport around the Greek periphery for air pollution levels monitoring. In collaboration with local governments, which determine the needs for specific scientific research, the Mobile Station is used to monitor atmospheric pollutants and meteorological parameters, before reports with the scientific results are composed. These reports are available to the authorities for evaluation and the information of the citizens.

The Mobile Air Quality Monitoring Station is equipped with the following monitoring systems:

• Air pollution monitoring systems (NO, NO2, O3, SO2, CO, HC, CH4).

• Automated filter sampler for PM10 particulate matter

• Filter samplers for the collection of atmospheric air and subsequent chemical analyses (optionally)

• Noise meter

• Meteorological station.

Aerosols Monitoring Station

According to the latest Intergovernmental Panel for Climate Change report, in-situ aerosol measurements are absolutely necessary, at a systematic basis and from appropriately equipped stations, in order to shed lights on their role on climate. The Aerosol Monitoring Station at I.E.R.S.D.'s premises in Penteli (2008-2013) and Thissio (2013 up to now), is organized and operates upon an integrated strategic plan aiming at high quality measurements, in order to reduce the uncertainty in the spatial and temporal distribution of aerosols at the urban background.

The Station operates since March 2008 and its main goal includes the study of aerosols physical characteristics, their optical properties and their chemical composition, in order to investigate their production and transport processes over the Eastern Mediterranean, their climatic role and their impacts on health and ecosystems. The simultaneous determination of aerosols chemical composition and their optical and physical properties, allows the identification of certain schemes for physical and optical characteristics based on their origins.

The following instruments were operated in Penteli:

• Mobile integrated nephelometer for the measurement of the scattering coefficient at 530 nm.

• A Particle Soot Absorption Photometer (PSAP) for the measurement of the absorption coefficient at three wavelengths (470, 522 and 660 nm).

• An ozone analyzer.

• Automated filter samplers for PM10, PM2.5 and PM2.5-10.

The following instruments are operated in Thissio:

• Gas analyzers / air pollution monitoring systems (NO, NO2, O3, SO2, CO, PM10).

• Automated filter samplers for PM10, PM2.5 and PM2.5-10.

• Occasionally additional equipment is transferred at the station for air quality measurements (e.g. aethalometers, on-line chemistry instruments, scanning mobility particle sizer